[ViewVC] Diff of: cvs/libev/ev.c

Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC

…		…
		1	/*
		2	* Copyright (c) 2007 Marc Alexander Lehmann <libev@schmorp.de>
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions are
		7	* met:
		8	*
		9	* * Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	*
		12	* * Redistributions in binary form must reproduce the above
		13	* copyright notice, this list of conditions and the following
		14	* disclaimer in the documentation and/or other materials provided
		15	* with the distribution.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
		18	* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
		19	* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
		20	* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
		21	* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
		22	* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
		23	* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		24	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		25	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		26	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
		27	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		28	*/
		29
1	#include <math.h>	30	#include <math.h>
2	#include <stdlib.h>	31	#include <stdlib.h>
		32	#include <unistd.h>
		33	#include <fcntl.h>
		34	#include <signal.h>
		35	#include <stddef.h>
3		36
4	#include <stdio.h>	37	#include <stdio.h>
5		38
		39	#include <assert.h>
6	#include <errno.h>	40	#include <errno.h>
		41	#include <sys/types.h>
		42	#include <sys/wait.h>
7	#include <sys/time.h>	43	#include <sys/time.h>
8	#include <time.h>	44	#include <time.h>
9		45
		46	#ifndef HAVE_MONOTONIC
10	#ifdef CLOCK_MONOTONIC	47	# ifdef CLOCK_MONOTONIC
11	# define HAVE_MONOTONIC 1	48	# define HAVE_MONOTONIC 1
12	#endif	49	# endif
		50	#endif
13		51
14	#define HAVE_EPOLL 1	52	#ifndef HAVE_SELECT
15	#define HAVE_REALTIME 1
16	#define HAVE_SELECT 0	53	# define HAVE_SELECT 1
		54	#endif
17		55
		56	#ifndef HAVE_EPOLL
		57	# define HAVE_EPOLL 0
		58	#endif
		59
		60	#ifndef HAVE_REALTIME
		61	# define HAVE_REALTIME 1 /* posix requirement, but might be slower */
		62	#endif
		63
		64	#define MIN_TIMEJUMP 1. /* minimum timejump that gets detected (if monotonic clock available) */
18	#define MAX_BLOCKTIME 60.	65	#define MAX_BLOCKTIME 60.
		66	#define PID_HASHSIZE 16 /* size of pid hahs table, must be power of two */
19		67
20	#include "ev.h"	68	#include "ev.h"
21		69
22	struct ev_watcher {	70	typedef struct ev_watcher *W;
23	EV_WATCHER (ev_watcher);
24	};
25
26	struct ev_watcher_list {	71	typedef struct ev_watcher_list *WL;
27	EV_WATCHER_LIST (ev_watcher_list);	72	typedef struct ev_watcher_time *WT;
28	};
29		73
		74	static ev_tstamp now, diff; /* monotonic clock */
30	ev_tstamp ev_now;	75	ev_tstamp ev_now;
31	int ev_method;	76	int ev_method;
32		77
33	static int have_monotonic; /* runtime */	78	static int have_monotonic; /* runtime */
34		79
35	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */	80	static ev_tstamp method_fudge; /* stupid epoll-returns-early bug */
36	static void (*method_reify)(void);	81	static void (*method_modify)(int fd, int oev, int nev);
37	static void (*method_poll)(ev_tstamp timeout);	82	static void (*method_poll)(ev_tstamp timeout);
		83
		84	/*****************************************************************************/
38		85
39	ev_tstamp	86	ev_tstamp
40	ev_time (void)	87	ev_time (void)
41	{	88	{
42	#if HAVE_REALTIME	89	#if HAVE_REALTIME
66	}	113	}
67		114
68	#define array_needsize(base,cur,cnt,init) \	115	#define array_needsize(base,cur,cnt,init) \
69	if ((cnt) > cur) \	116	if ((cnt) > cur) \
70	{ \	117	{ \
71	int newcnt = cur ? cur << 1 : 16; \	118	int newcnt = cur; \
72	fprintf (stderr, "resize(" # base ") from %d to %d\n", cur, newcnt);\	119	do \
		120	{ \
		121	newcnt = (newcnt << 1) \| 4 & ~3; \
		122	} \
		123	while ((cnt) > newcnt); \
		124	\
73	base = realloc (base, sizeof (base) (newcnt)); \	125	base = realloc (base, sizeof (base) (newcnt)); \
74	init (base + cur, newcnt - cur); \	126	init (base + cur, newcnt - cur); \
75	cur = newcnt; \	127	cur = newcnt; \
76	}	128	}
77		129
		130	/*****************************************************************************/
		131
78	typedef struct	132	typedef struct
79	{	133	{
80	struct ev_io *head;	134	struct ev_io *head;
81	unsigned char wev, rev; /* want, received event set */	135	unsigned char wev, rev; /* want, received event set */
82	} ANFD;	136	} ANFD;
…		…
98	}	152	}
99	}	153	}
100		154
101	typedef struct	155	typedef struct
102	{	156	{
103	struct ev_watcher *w;	157	W w;
104	int events;	158	int events;
105	} ANPENDING;	159	} ANPENDING;
106		160
107	static ANPENDING *pendings;	161	static ANPENDING *pendings;
108	static int pendingmax, pendingcnt;	162	static int pendingmax, pendingcnt;
109		163
110	static void	164	static void
111	event (struct ev_watcher *w, int events)	165	event (W w, int events)
112	{	166	{
		167	if (w->active)
		168	{
113	w->pending = ++pendingcnt;	169	w->pending = ++pendingcnt;
114	array_needsize (pendings, pendingmax, pendingcnt, );	170	array_needsize (pendings, pendingmax, pendingcnt, );
115	pendings [pendingcnt - 1].w = w;	171	pendings [pendingcnt - 1].w = w;
116	pendings [pendingcnt - 1].events = events;	172	pendings [pendingcnt - 1].events = events;
		173	}
117	}	174	}
118		175
119	static void	176	static void
120	fd_event (int fd, int events)	177	fd_event (int fd, int events)
121	{	178	{
…		…
125	for (w = anfd->head; w; w = w->next)	182	for (w = anfd->head; w; w = w->next)
126	{	183	{
127	int ev = w->events & events;	184	int ev = w->events & events;
128		185
129	if (ev)	186	if (ev)
130	event ((struct ev_watcher *)w, ev);	187	event ((W)w, ev);
131	}	188	}
132	}	189	}
		190
		191	static void
		192	queue_events (W *events, int eventcnt, int type)
		193	{
		194	int i;
		195
		196	for (i = 0; i < eventcnt; ++i)
		197	event (events [i], type);
		198	}
		199
		200	/* called on EBADF to verify fds */
		201	static void
		202	fd_recheck (void)
		203	{
		204	int fd;
		205
		206	for (fd = 0; fd < anfdmax; ++fd)
		207	if (anfds [fd].wev)
		208	if (fcntl (fd, F_GETFD) == -1 && errno == EBADF)
		209	while (anfds [fd].head)
		210	{
		211	event ((W)anfds [fd].head, EV_ERROR);
		212	evio_stop (anfds [fd].head);
		213	}
		214	}
		215
		216	/*****************************************************************************/
133		217
134	static struct ev_timer **timers;	218	static struct ev_timer **timers;
135	static int timermax, timercnt;	219	static int timermax, timercnt;
136		220
		221	static struct ev_periodic **periodics;
		222	static int periodicmax, periodiccnt;
		223
137	static void	224	static void
138	upheap (int k)	225	upheap (WT *timers, int k)
139	{	226	{
140	struct ev_timer *w = timers [k];	227	WT w = timers [k];
141		228
142	while (k && timers [k >> 1]->at > w->at)	229	while (k && timers [k >> 1]->at > w->at)
143	{	230	{
144	timers [k] = timers [k >> 1];	231	timers [k] = timers [k >> 1];
145	timers [k]->active = k + 1;	232	timers [k]->active = k + 1;
…		…
150	timers [k]->active = k + 1;	237	timers [k]->active = k + 1;
151		238
152	}	239	}
153		240
154	static void	241	static void
155	downheap (int k)	242	downheap (WT *timers, int N, int k)
156	{	243	{
157	struct ev_timer *w = timers [k];	244	WT w = timers [k];
158		245
159	while (k < (timercnt >> 1))	246	while (k < (N >> 1))
160	{	247	{
161	int j = k << 1;	248	int j = k << 1;
162		249
163	if (j + 1 < timercnt && timers [j]->at > timers [j + 1]->at)	250	if (j + 1 < N && timers [j]->at > timers [j + 1]->at)
164	++j;	251	++j;
165		252
166	if (w->at <= timers [j]->at)	253	if (w->at <= timers [j]->at)
167	break;	254	break;
168		255
…		…
173		260
174	timers [k] = w;	261	timers [k] = w;
175	timers [k]->active = k + 1;	262	timers [k]->active = k + 1;
176	}	263	}
177		264
178	static struct ev_signal **signals;	265	/*****************************************************************************/
		266
		267	typedef struct
		268	{
		269	struct ev_signal *head;
		270	sig_atomic_t gotsig;
		271	} ANSIG;
		272
		273	static ANSIG *signals;
179	static int signalmax, signalcnt;	274	static int signalmax;
180		275
		276	static int sigpipe [2];
		277	static sig_atomic_t gotsig;
		278	static struct ev_io sigev;
		279
181	static void	280	static void
182	signals_init (struct ev_signal **base, int count)	281	signals_init (ANSIG *base, int count)
183	{	282	{
184	while (count--)	283	while (count--)
185	*base++ = 0;	284	{
		285	base->head = 0;
		286	base->gotsig = 0;
		287	++base;
		288	}
186	}	289	}
		290
		291	static void
		292	sighandler (int signum)
		293	{
		294	signals [signum - 1].gotsig = 1;
		295
		296	if (!gotsig)
		297	{
		298	gotsig = 1;
		299	write (sigpipe [1], &gotsig, 1);
		300	}
		301	}
		302
		303	static void
		304	sigcb (struct ev_io *iow, int revents)
		305	{
		306	struct ev_signal *w;
		307	int sig;
		308
		309	gotsig = 0;
		310	read (sigpipe [0], &revents, 1);
		311
		312	for (sig = signalmax; sig--; )
		313	if (signals [sig].gotsig)
		314	{
		315	signals [sig].gotsig = 0;
		316
		317	for (w = signals [sig].head; w; w = w->next)
		318	event ((W)w, EV_SIGNAL);
		319	}
		320	}
		321
		322	static void
		323	siginit (void)
		324	{
		325	fcntl (sigpipe [0], F_SETFD, FD_CLOEXEC);
		326	fcntl (sigpipe [1], F_SETFD, FD_CLOEXEC);
		327
		328	/* rather than sort out wether we really need nb, set it */
		329	fcntl (sigpipe [0], F_SETFL, O_NONBLOCK);
		330	fcntl (sigpipe [1], F_SETFL, O_NONBLOCK);
		331
		332	evio_set (&sigev, sigpipe [0], EV_READ);
		333	evio_start (&sigev);
		334	}
		335
		336	/*****************************************************************************/
		337
		338	static struct ev_idle **idles;
		339	static int idlemax, idlecnt;
		340
		341	static struct ev_prepare **prepares;
		342	static int preparemax, preparecnt;
		343
		344	static struct ev_check **checks;
		345	static int checkmax, checkcnt;
		346
		347	/*****************************************************************************/
		348
		349	static struct ev_child *childs [PID_HASHSIZE];
		350	static struct ev_signal childev;
		351
		352	#ifndef WCONTINUED
		353	# define WCONTINUED 0
		354	#endif
		355
		356	static void
		357	childcb (struct ev_signal *sw, int revents)
		358	{
		359	struct ev_child *w;
		360	int pid, status;
		361
		362	while ((pid = waitpid (-1, &status, WNOHANG \| WUNTRACED \| WCONTINUED)) != -1)
		363	for (w = childs [pid & (PID_HASHSIZE - 1)]; w; w = w->next)
		364	if (w->pid == pid \|\| w->pid == -1)
		365	{
		366	w->status = status;
		367	event ((W)w, EV_CHILD);
		368	}
		369	}
		370
		371	/*****************************************************************************/
187		372
188	#if HAVE_EPOLL	373	#if HAVE_EPOLL
189	# include "ev_epoll.c"	374	# include "ev_epoll.c"
190	#endif	375	#endif
191	#if HAVE_SELECT	376	#if HAVE_SELECT
192	# include "ev_select.c"	377	# include "ev_select.c"
193	#endif	378	#endif
194		379
		380	int
		381	ev_version_major (void)
		382	{
		383	return EV_VERSION_MAJOR;
		384	}
		385
		386	int
		387	ev_version_minor (void)
		388	{
		389	return EV_VERSION_MINOR;
		390	}
		391
195	int ev_init (int flags)	392	int ev_init (int flags)
196	{	393	{
		394	if (!ev_method)
		395	{
197	#if HAVE_MONOTONIC	396	#if HAVE_MONOTONIC
198	{	397	{
199	struct timespec ts;	398	struct timespec ts;
200	if (!clock_gettime (CLOCK_MONOTONIC, &ts))	399	if (!clock_gettime (CLOCK_MONOTONIC, &ts))
201	have_monotonic = 1;	400	have_monotonic = 1;
202	}	401	}
203	#endif	402	#endif
204		403
205	ev_now = ev_time ();	404	ev_now = ev_time ();
		405	now = get_clock ();
		406	diff = ev_now - now;
206		407
		408	if (pipe (sigpipe))
		409	return 0;
		410
		411	ev_method = EVMETHOD_NONE;
207	#if HAVE_EPOLL	412	#if HAVE_EPOLL
208	if (epoll_init (flags))	413	if (ev_method == EVMETHOD_NONE) epoll_init (flags);
209	return ev_method;
210	#endif	414	#endif
211	#if HAVE_SELECT	415	#if HAVE_SELECT
212	if (select_init (flags))	416	if (ev_method == EVMETHOD_NONE) select_init (flags);
213	return ev_method;
214	#endif	417	#endif
215		418
216	ev_method = EVMETHOD_NONE;	419	if (ev_method)
		420	{
		421	evw_init (&sigev, sigcb);
		422	siginit ();
		423
		424	evsignal_init (&childev, childcb, SIGCHLD);
		425	evsignal_start (&childev);
		426	}
		427	}
		428
217	return ev_method;	429	return ev_method;
218	}	430	}
219		431
		432	/*****************************************************************************/
		433
		434	void
220	void ev_prefork (void)	435	ev_prefork (void)
221	{	436	{
		437	/* nop */
222	}	438	}
223		439
		440	void
224	void ev_postfork_parent (void)	441	ev_postfork_parent (void)
225	{	442	{
		443	/* nop */
226	}	444	}
227		445
		446	void
228	void ev_postfork_child (void)	447	ev_postfork_child (void)
229	{	448	{
230	#if HAVE_EPOLL	449	#if HAVE_EPOLL
		450	if (ev_method == EVMETHOD_EPOLL)
231	epoll_postfork_child ();	451	epoll_postfork_child ();
232	#endif	452	#endif
233	}
234		453
		454	evio_stop (&sigev);
		455	close (sigpipe [0]);
		456	close (sigpipe [1]);
		457	pipe (sigpipe);
		458	siginit ();
		459	}
		460
		461	/*****************************************************************************/
		462
235	static void	463	static void
236	call_pending ()	464	fd_reify (void)
237	{	465	{
238	int i;	466	int i;
239		467
240	for (i = 0; i < pendingcnt; ++i)	468	for (i = 0; i < fdchangecnt; ++i)
		469	{
		470	int fd = fdchanges [i];
		471	ANFD *anfd = anfds + fd;
		472	struct ev_io *w;
		473
		474	int wev = 0;
		475
		476	for (w = anfd->head; w; w = w->next)
		477	wev \|= w->events;
		478
		479	if (anfd->wev != wev)
		480	{
		481	method_modify (fd, anfd->wev, wev);
		482	anfd->wev = wev;
		483	}
241	{	484	}
		485
		486	fdchangecnt = 0;
		487	}
		488
		489	static void
		490	call_pending (void)
		491	{
		492	while (pendingcnt)
		493	{
242	ANPENDING *p = pendings + i;	494	ANPENDING *p = pendings + --pendingcnt;
243		495
244	if (p->w)	496	if (p->w)
245	{	497	{
246	p->w->pending = 0;	498	p->w->pending = 0;
247	p->w->cb (p->w, p->events);	499	p->w->cb (p->w, p->events);
248	}	500	}
249	}	501	}
250
251	pendingcnt = 0;
252	}	502	}
253		503
254	static void	504	static void
255	timer_reify (void)	505	timers_reify (void)
256	{	506	{
257	while (timercnt && timers [0]->at <= ev_now)	507	while (timercnt && timers [0]->at <= now)
258	{	508	{
259	struct ev_timer *w = timers [0];	509	struct ev_timer *w = timers [0];
260		510
261	fprintf (stderr, "0 %f, %d c%d\n", w->at, w->active, timercnt);//D	511	event ((W)w, EV_TIMEOUT);
		512
262	/* first reschedule timer */	513	/* first reschedule or stop timer */
263	if (w->repeat)	514	if (w->repeat)
264	{	515	{
265	fprintf (stderr, "a %f now %f repeat %f, %f\n", w->at, ev_now, w->repeat, w->repeat *1e30);//D
266	if (w->is_abs)
267	w->at += ceil ((ev_now - w->at) / w->repeat + 1.) * w->repeat;
268	else
269	w->at = ev_now + w->repeat;	516	w->at = now + w->repeat;
270		517	assert (("timer timeout in the past, negative repeat?", w->at > now));
271	fprintf (stderr, "b %f\n", w->at);//D	518	downheap ((WT *)timers, timercnt, 0);
272
273	downheap (0);
274	}	519	}
275	else	520	else
276	{
277	fprintf (stderr, "c %f, %d c%d\n", w->at, w->active, timercnt);//D
278	evtimer_stop (w); /* nonrepeating: stop timer */	521	evtimer_stop (w); /* nonrepeating: stop timer */
		522	}
		523	}
		524
		525	static void
		526	periodics_reify (void)
		527	{
		528	while (periodiccnt && periodics [0]->at <= ev_now)
		529	{
		530	struct ev_periodic *w = periodics [0];
		531
		532	/* first reschedule or stop timer */
		533	if (w->interval)
279	}	534	{
		535	w->at += floor ((ev_now - w->at) / w->interval + 1.) * w->interval;
		536	assert (("periodic timeout in the past, negative interval?", w->at > ev_now));
		537	downheap ((WT *)periodics, periodiccnt, 0);
		538	}
		539	else
		540	evperiodic_stop (w); /* nonrepeating: stop timer */
280		541
281	event ((struct ev_watcher *)w, EV_TIMEOUT);	542	event ((W)w, EV_TIMEOUT);
		543	}
		544	}
		545
		546	static void
		547	periodics_reschedule (ev_tstamp diff)
		548	{
		549	int i;
		550
		551	/* adjust periodics after time jump */
		552	for (i = 0; i < periodiccnt; ++i)
		553	{
		554	struct ev_periodic *w = periodics [i];
		555
		556	if (w->interval)
		557	{
		558	ev_tstamp diff = ceil ((ev_now - w->at) / w->interval) * w->interval;
		559
		560	if (fabs (diff) >= 1e-4)
		561	{
		562	evperiodic_stop (w);
		563	evperiodic_start (w);
		564
		565	i = 0; /* restart loop, inefficient, but time jumps should be rare */
		566	}
		567	}
		568	}
		569	}
		570
		571	static void
		572	time_update (void)
		573	{
		574	int i;
		575
		576	ev_now = ev_time ();
		577
		578	if (have_monotonic)
		579	{
		580	ev_tstamp odiff = diff;
		581
		582	for (i = 4; --i; ) /* loop a few times, before making important decisions */
		583	{
		584	now = get_clock ();
		585	diff = ev_now - now;
		586
		587	if (fabs (odiff - diff) < MIN_TIMEJUMP)
		588	return; /* all is well */
		589
		590	ev_now = ev_time ();
		591	}
		592
		593	periodics_reschedule (diff - odiff);
		594	/* no timer adjustment, as the monotonic clock doesn't jump */
		595	}
		596	else
		597	{
		598	if (now > ev_now \|\| now < ev_now - MAX_BLOCKTIME - MIN_TIMEJUMP)
		599	{
		600	periodics_reschedule (ev_now - now);
		601
		602	/* adjust timers. this is easy, as the offset is the same for all */
		603	for (i = 0; i < timercnt; ++i)
		604	timers [i]->at += diff;
		605	}
		606
		607	now = ev_now;
282	}	608	}
283	}	609	}
284		610
285	int ev_loop_done;	611	int ev_loop_done;
286		612
287	int ev_loop (int flags)	613	void ev_loop (int flags)
288	{	614	{
289	double block;	615	double block;
290	ev_loop_done = flags & EVLOOP_ONESHOT;	616	ev_loop_done = flags & EVLOOP_ONESHOT ? 1 : 0;
291		617
292	do	618	do
293	{	619	{
		620	/* queue check watchers (and execute them) */
		621	if (preparecnt)
		622	{
		623	queue_events ((W *)prepares, preparecnt, EV_PREPARE);
		624	call_pending ();
		625	}
		626
294	/* update fd-related kernel structures */	627	/* update fd-related kernel structures */
295	method_reify (); fdchangecnt = 0;	628	fd_reify ();
296		629
297	/* calculate blocking time */	630	/* calculate blocking time */
		631
		632	/* we only need this for !monotonic clockor timers, but as we basically
		633	always have timers, we just calculate it always */
298	ev_now = ev_time ();	634	ev_now = ev_time ();
299		635
300	if (flags & EVLOOP_NONBLOCK)	636	if (flags & EVLOOP_NONBLOCK \|\| idlecnt)
301	block = 0.;	637	block = 0.;
302	else if (!timercnt)
303	block = MAX_BLOCKTIME;
304	else	638	else
305	{	639	{
		640	block = MAX_BLOCKTIME;
		641
		642	if (timercnt)
		643	{
		644	ev_tstamp to = timers [0]->at - (have_monotonic ? get_clock () : ev_now) + method_fudge;
		645	if (block > to) block = to;
		646	}
		647
		648	if (periodiccnt)
		649	{
306	block = timers [0]->at - ev_now + method_fudge;	650	ev_tstamp to = periodics [0]->at - ev_now + method_fudge;
		651	if (block > to) block = to;
		652	}
		653
307	if (block < 0.) block = 0.;	654	if (block < 0.) block = 0.;
308	else if (block > MAX_BLOCKTIME) block = MAX_BLOCKTIME;
309	}	655	}
310		656
311	fprintf (stderr, "block %f\n", block);//D
312	method_poll (block);	657	method_poll (block);
313		658
		659	/* update ev_now, do magic */
		660	time_update ();
		661
314	/* put pending timers into pendign queue and reschedule them */	662	/* queue pending timers and reschedule them */
315	timer_reify ();	663	timers_reify (); /* relative timers called last */
		664	periodics_reify (); /* absolute timers called first */
316		665
317	ev_now = ev_time ();	666	/* queue idle watchers unless io or timers are pending */
		667	if (!pendingcnt)
		668	queue_events ((W *)idles, idlecnt, EV_IDLE);
		669
		670	/* queue check watchers, to be executed first */
		671	if (checkcnt)
		672	queue_events ((W *)checks, checkcnt, EV_CHECK);
		673
318	call_pending ();	674	call_pending ();
319	}	675	}
320	while (!ev_loop_done);	676	while (!ev_loop_done);
321	}
322		677
		678	if (ev_loop_done != 2)
		679	ev_loop_done = 0;
		680	}
		681
		682	/*****************************************************************************/
		683
323	static void	684	static void
324	wlist_add (struct ev_watcher_list *head, struct ev_watcher_list elem)	685	wlist_add (WL *head, WL elem)
325	{	686	{
326	elem->next = *head;	687	elem->next = *head;
327	*head = elem;	688	*head = elem;
328	}	689	}
329		690
330	static void	691	static void
331	wlist_del (struct ev_watcher_list *head, struct ev_watcher_list elem)	692	wlist_del (WL *head, WL elem)
332	{	693	{
333	while (*head)	694	while (*head)
334	{	695	{
335	if (*head == elem)	696	if (*head == elem)
336	{	697	{
…		…
341	head = &(*head)->next;	702	head = &(*head)->next;
342	}	703	}
343	}	704	}
344		705
345	static void	706	static void
346	ev_start (struct ev_watcher *w, int active)	707	ev_clear (W w)
347	{	708	{
		709	if (w->pending)
		710	{
		711	pendings [w->pending - 1].w = 0;
348	w->pending = 0;	712	w->pending = 0;
		713	}
		714	}
		715
		716	static void
		717	ev_start (W w, int active)
		718	{
349	w->active = active;	719	w->active = active;
350	}	720	}
351		721
352	static void	722	static void
353	ev_stop (struct ev_watcher *w)	723	ev_stop (W w)
354	{	724	{
355	if (w->pending)
356	pendings [w->pending - 1].w = 0;
357
358	w->active = 0;	725	w->active = 0;
359	/* nop */
360	}	726	}
		727
		728	/*****************************************************************************/
361		729
362	void	730	void
363	evio_start (struct ev_io *w)	731	evio_start (struct ev_io *w)
364	{	732	{
365	if (ev_is_active (w))	733	if (ev_is_active (w))
366	return;	734	return;
367		735
368	int fd = w->fd;	736	int fd = w->fd;
369		737
370	ev_start ((struct ev_watcher *)w, 1);	738	ev_start ((W)w, 1);
371	array_needsize (anfds, anfdmax, fd + 1, anfds_init);	739	array_needsize (anfds, anfdmax, fd + 1, anfds_init);
372	wlist_add ((struct ev_watcher_list *)&anfds[fd].head, (struct ev_watcher_list )w);	740	wlist_add ((WL *)&anfds[fd].head, (WL)w);
373		741
374	++fdchangecnt;	742	++fdchangecnt;
375	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	743	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
376	fdchanges [fdchangecnt - 1] = fd;	744	fdchanges [fdchangecnt - 1] = fd;
377	}	745	}
378		746
379	void	747	void
380	evio_stop (struct ev_io *w)	748	evio_stop (struct ev_io *w)
381	{	749	{
		750	ev_clear ((W)w);
382	if (!ev_is_active (w))	751	if (!ev_is_active (w))
383	return;	752	return;
384		753
385	wlist_del ((struct ev_watcher_list *)&anfds[w->fd].head, (struct ev_watcher_list )w);	754	wlist_del ((WL *)&anfds[w->fd].head, (WL)w);
386	ev_stop ((struct ev_watcher *)w);	755	ev_stop ((W)w);
387		756
388	++fdchangecnt;	757	++fdchangecnt;
389	array_needsize (fdchanges, fdchangemax, fdchangecnt, );	758	array_needsize (fdchanges, fdchangemax, fdchangecnt, );
390	fdchanges [fdchangecnt - 1] = w->fd;	759	fdchanges [fdchangecnt - 1] = w->fd;
391	}	760	}
…		…
394	evtimer_start (struct ev_timer *w)	763	evtimer_start (struct ev_timer *w)
395	{	764	{
396	if (ev_is_active (w))	765	if (ev_is_active (w))
397	return;	766	return;
398		767
399	fprintf (stderr, "t1 %f a %d\n", w->at, w->is_abs);//D
400	if (w->is_abs)
401	{
402	/* this formula differs from the one in timer_reify becuse we do not round up */
403	if (w->repeat)
404	w->at += ceil ((ev_now - w->at) / w->repeat) * w->repeat;
405	}
406	else
407	w->at += ev_now;	768	w->at += now;
408	fprintf (stderr, "t2 %f a %d\n", w->at, w->is_abs);//D
409		769
410	ev_start ((struct ev_watcher *)w, ++timercnt);	770	assert (("timer repeat value less than zero not allowed", w->repeat >= 0.));
		771
		772	ev_start ((W)w, ++timercnt);
411	array_needsize (timers, timermax, timercnt, );	773	array_needsize (timers, timermax, timercnt, );
412	timers [timercnt - 1] = w;	774	timers [timercnt - 1] = w;
413	upheap (timercnt - 1);	775	upheap ((WT *)timers, timercnt - 1);
414	}	776	}
415		777
416	void	778	void
417	evtimer_stop (struct ev_timer *w)	779	evtimer_stop (struct ev_timer *w)
418	{	780	{
419	fprintf (stderr, "-topping %d, %d\n", w->active, timercnt);//D	781	ev_clear ((W)w);
420	if (!ev_is_active (w))	782	if (!ev_is_active (w))
421	return;	783	return;
422		784
423	fprintf (stderr, "stopping %d, %d\n", w->active, timercnt);//D
424	if (w->active < timercnt)	785	if (w->active < timercnt--)
425	{	786	{
426	timers [w->active - 1] = timers [--timercnt];	787	timers [w->active - 1] = timers [timercnt];
427	downheap (w->active - 1);	788	downheap ((WT *)timers, timercnt, w->active - 1);
		789	}
		790
		791	w->at = w->repeat;
		792
		793	ev_stop ((W)w);
		794	}
		795
		796	void
		797	evtimer_again (struct ev_timer *w)
		798	{
		799	if (ev_is_active (w))
428	}	800	{
		801	if (w->repeat)
		802	{
		803	w->at = now + w->repeat;
		804	downheap ((WT *)timers, timercnt, w->active - 1);
		805	}
		806	else
		807	evtimer_stop (w);
		808	}
		809	else if (w->repeat)
		810	evtimer_start (w);
		811	}
429		812
430	ev_stop ((struct ev_watcher *)w);	813	void
		814	evperiodic_start (struct ev_periodic *w)
		815	{
		816	if (ev_is_active (w))
		817	return;
		818
		819	assert (("periodic interval value less than zero not allowed", w->interval >= 0.));
		820
		821	/* this formula differs from the one in periodic_reify because we do not always round up */
		822	if (w->interval)
		823	w->at += ceil ((ev_now - w->at) / w->interval) * w->interval;
		824
		825	ev_start ((W)w, ++periodiccnt);
		826	array_needsize (periodics, periodicmax, periodiccnt, );
		827	periodics [periodiccnt - 1] = w;
		828	upheap ((WT *)periodics, periodiccnt - 1);
		829	}
		830
		831	void
		832	evperiodic_stop (struct ev_periodic *w)
		833	{
		834	ev_clear ((W)w);
		835	if (!ev_is_active (w))
		836	return;
		837
		838	if (w->active < periodiccnt--)
		839	{
		840	periodics [w->active - 1] = periodics [periodiccnt];
		841	downheap ((WT *)periodics, periodiccnt, w->active - 1);
		842	}
		843
		844	ev_stop ((W)w);
431	}	845	}
432		846
433	void	847	void
434	evsignal_start (struct ev_signal *w)	848	evsignal_start (struct ev_signal *w)
435	{	849	{
436	if (ev_is_active (w))	850	if (ev_is_active (w))
437	return;	851	return;
438		852
439	ev_start ((struct ev_watcher *)w, 1);	853	ev_start ((W)w, 1);
440	array_needsize (signals, signalmax, w->signum, signals_init);	854	array_needsize (signals, signalmax, w->signum, signals_init);
441	wlist_add ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	855	wlist_add ((WL *)&signals [w->signum - 1].head, (WL)w);
		856
		857	if (!w->next)
		858	{
		859	struct sigaction sa;
		860	sa.sa_handler = sighandler;
		861	sigfillset (&sa.sa_mask);
		862	sa.sa_flags = 0;
		863	sigaction (w->signum, &sa, 0);
		864	}
442	}	865	}
443		866
444	void	867	void
445	evsignal_stop (struct ev_signal *w)	868	evsignal_stop (struct ev_signal *w)
446	{	869	{
		870	ev_clear ((W)w);
447	if (!ev_is_active (w))	871	if (!ev_is_active (w))
448	return;	872	return;
449		873
450	wlist_del ((struct ev_watcher_list *)&signals [w->signum - 1], (struct ev_watcher_list )w);	874	wlist_del ((WL *)&signals [w->signum - 1].head, (WL)w);
451	ev_stop ((struct ev_watcher *)w);	875	ev_stop ((W)w);
452	}
453		876
		877	if (!signals [w->signum - 1].head)
		878	signal (w->signum, SIG_DFL);
		879	}
		880
		881	void evidle_start (struct ev_idle *w)
		882	{
		883	if (ev_is_active (w))
		884	return;
		885
		886	ev_start ((W)w, ++idlecnt);
		887	array_needsize (idles, idlemax, idlecnt, );
		888	idles [idlecnt - 1] = w;
		889	}
		890
		891	void evidle_stop (struct ev_idle *w)
		892	{
		893	ev_clear ((W)w);
		894	if (ev_is_active (w))
		895	return;
		896
		897	idles [w->active - 1] = idles [--idlecnt];
		898	ev_stop ((W)w);
		899	}
		900
		901	void evprepare_start (struct ev_prepare *w)
		902	{
		903	if (ev_is_active (w))
		904	return;
		905
		906	ev_start ((W)w, ++preparecnt);
		907	array_needsize (prepares, preparemax, preparecnt, );
		908	prepares [preparecnt - 1] = w;
		909	}
		910
		911	void evprepare_stop (struct ev_prepare *w)
		912	{
		913	ev_clear ((W)w);
		914	if (ev_is_active (w))
		915	return;
		916
		917	prepares [w->active - 1] = prepares [--preparecnt];
		918	ev_stop ((W)w);
		919	}
		920
		921	void evcheck_start (struct ev_check *w)
		922	{
		923	if (ev_is_active (w))
		924	return;
		925
		926	ev_start ((W)w, ++checkcnt);
		927	array_needsize (checks, checkmax, checkcnt, );
		928	checks [checkcnt - 1] = w;
		929	}
		930
		931	void evcheck_stop (struct ev_check *w)
		932	{
		933	ev_clear ((W)w);
		934	if (ev_is_active (w))
		935	return;
		936
		937	checks [w->active - 1] = checks [--checkcnt];
		938	ev_stop ((W)w);
		939	}
		940
		941	void evchild_start (struct ev_child *w)
		942	{
		943	if (ev_is_active (w))
		944	return;
		945
		946	ev_start ((W)w, 1);
		947	wlist_add ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		948	}
		949
		950	void evchild_stop (struct ev_child *w)
		951	{
		952	ev_clear ((W)w);
		953	if (ev_is_active (w))
		954	return;
		955
		956	wlist_del ((WL *)&childs [w->pid & (PID_HASHSIZE - 1)], (WL)w);
		957	ev_stop ((W)w);
		958	}
		959
454	/*****************************************************************************/	960	/*****************************************************************************/
		961
		962	struct ev_once
		963	{
		964	struct ev_io io;
		965	struct ev_timer to;
		966	void (cb)(int revents, void arg);
		967	void *arg;
		968	};
		969
		970	static void
		971	once_cb (struct ev_once *once, int revents)
		972	{
		973	void (cb)(int revents, void arg) = once->cb;
		974	void *arg = once->arg;
		975
		976	evio_stop (&once->io);
		977	evtimer_stop (&once->to);
		978	free (once);
		979
		980	cb (revents, arg);
		981	}
		982
		983	static void
		984	once_cb_io (struct ev_io *w, int revents)
		985	{
		986	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, io)), revents);
		987	}
		988
		989	static void
		990	once_cb_to (struct ev_timer *w, int revents)
		991	{
		992	once_cb ((struct ev_once )(((char )w) - offsetof (struct ev_once, to)), revents);
		993	}
		994
		995	void
		996	ev_once (int fd, int events, ev_tstamp timeout, void (cb)(int revents, void arg), void *arg)
		997	{
		998	struct ev_once *once = malloc (sizeof (struct ev_once));
		999
		1000	if (!once)
		1001	cb (EV_ERROR, arg);
		1002	else
		1003	{
		1004	once->cb = cb;
		1005	once->arg = arg;
		1006
		1007	evw_init (&once->io, once_cb_io);
		1008
		1009	if (fd >= 0)
		1010	{
		1011	evio_set (&once->io, fd, events);
		1012	evio_start (&once->io);
		1013	}
		1014
		1015	evw_init (&once->to, once_cb_to);
		1016
		1017	if (timeout >= 0.)
		1018	{
		1019	evtimer_set (&once->to, timeout, 0.);
		1020	evtimer_start (&once->to);
		1021	}
		1022	}
		1023	}
		1024
		1025	/*****************************************************************************/
		1026
455	#if 1	1027	#if 0
		1028
		1029	struct ev_io wio;
456		1030
457	static void	1031	static void
458	sin_cb (struct ev_io *w, int revents)	1032	sin_cb (struct ev_io *w, int revents)
459	{	1033	{
460	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);	1034	fprintf (stderr, "sin %d, revents %d\n", w->fd, revents);
461	}	1035	}
462		1036
463	static void	1037	static void
464	ocb (struct ev_timer *w, int revents)	1038	ocb (struct ev_timer *w, int revents)
465	{	1039	{
466	fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);	1040	//fprintf (stderr, "timer %f,%f (%x) (%f) d%p\n", w->at, w->repeat, revents, w->at - ev_time (), w->data);
		1041	evtimer_stop (w);
		1042	evtimer_start (w);
		1043	}
		1044
		1045	static void
		1046	scb (struct ev_signal *w, int revents)
		1047	{
		1048	fprintf (stderr, "signal %x,%d\n", revents, w->signum);
		1049	evio_stop (&wio);
		1050	evio_start (&wio);
		1051	}
		1052
		1053	static void
		1054	gcb (struct ev_signal *w, int revents)
		1055	{
		1056	fprintf (stderr, "generic %x\n", revents);
		1057
467	}	1058	}
468		1059
469	int main (void)	1060	int main (void)
470	{	1061	{
471	struct ev_io sin;
472
473	ev_init (0);	1062	ev_init (0);
474		1063
475	evw_init (&sin, sin_cb, 55);
476	evio_set (&sin, 0, EV_READ);	1064	evio_init (&wio, sin_cb, 0, EV_READ);
477	evio_start (&sin);	1065	evio_start (&wio);
478		1066
479	struct ev_timer t[1000];	1067	struct ev_timer t[10000];
480		1068
		1069	#if 0
481	int i;	1070	int i;
482	for (i = 0; i < 1000; ++i)	1071	for (i = 0; i < 10000; ++i)
483	{	1072	{
484	struct ev_timer *w = t + i;	1073	struct ev_timer *w = t + i;
485	evw_init (w, ocb, i);	1074	evw_init (w, ocb, i);
486	evtimer_set_rel (w, drand48 (), 0);	1075	evtimer_init_abs (w, ocb, drand48 (), 0.99775533);
487	evtimer_start (w);	1076	evtimer_start (w);
488	if (drand48 () < 0.5)	1077	if (drand48 () < 0.5)
489	evtimer_stop (w);	1078	evtimer_stop (w);
490	}	1079	}
		1080	#endif
		1081
		1082	struct ev_timer t1;
		1083	evtimer_init (&t1, ocb, 5, 10);
		1084	evtimer_start (&t1);
		1085
		1086	struct ev_signal sig;
		1087	evsignal_init (&sig, scb, SIGQUIT);
		1088	evsignal_start (&sig);
		1089
		1090	struct ev_check cw;
		1091	evcheck_init (&cw, gcb);
		1092	evcheck_start (&cw);
		1093
		1094	struct ev_idle iw;
		1095	evidle_init (&iw, gcb);
		1096	evidle_start (&iw);
491		1097
492	ev_loop (0);	1098	ev_loop (0);
493		1099
494	return 0;	1100	return 0;
495	}	1101	}

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Comparing libev/ev.c (file contents): Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs. Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC

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Comparing libev/ev.c (file contents):
Revision 1.2 by root, Tue Oct 30 21:42:12 2007 UTC vs.
Revision 1.24 by root, Wed Oct 31 20:46:44 2007 UTC